$150:\left(-30\right)$
$37+-23+-65+9+-12$
$log2\left(2x^2-10\right)-log2\left(10\right)=2$
$\frac{dy}{dx}=\frac{7x+2y}{x}$
$-10z=-6z-4$
$2xy-x-y,\:x=-2,\:y=-1$
$\int_3^{\infty}\left(\frac{5}{x}\right)dx$
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